Welding helmet



FIG. 1 is a front perspective view of the welding helmet showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof; and

FIG. 4 is a right side elevation view of the welding helmet, the left side elevation view being a mirror image thereof. 

The ornamental design for a welding helmet, as shown and described. 